Mask with an air filtering device

Abstract

This invention relates to a mask with an air filtering device and in particular to one including a helmet adapted to a head of a user, a visor pivotally connected with a lower side of the helmet and having a soft pad for preventing air entering therein from outside, a filtering chamber having a blower driven by a dc motor and a filtering plate mounted between the blower and a cover of the filtering chamber, a pipe connected at one end with an outlet of the blower and extending at the other to space around mouth and nose of the user, a curved air guider for converging cleaned air into the space around the mouth and nose of the user and a check valve mounted on the soft pad for exhausting air exhaled by the user.

I claim: 
     
       1. A mask with an air filtering device comprising: helmet adapted to a head of a user;   a visor pivotally connected with a lower side of said helmet and having a soft pad for preventing air entering therein from outside;   a filtering chamber having a blower driven by a dc motor and a filtering plate mounted between said blower and a cover of said filtering chamber which includes an inlet;   a pipe connected at one end with an outlet of said blower and extending at the other to a space around mouth and nose of said user;   a curved air guider for converging cleaned air into the space around the mouth and nose of said user; and   a check valve mounted on said soft pad for exhausting air exhaled by said user.